So far, he was more than living up to his end of the challenge.

The second half of the challenge would be the bill.

We are at a moment of great challenge in our history.

What's more, the business was no longer as much of a challenge.

The 2006-07 season was more of a challenge than ever.

Only then, in the moment of his challenge, did the whole thing become clear.

So far, that part of the challenge has not been met.

Try doing this 30 times each second and you get an idea of the challenge.

At first I thought they weren't, but that was part of the challenge.

Until this moment the true nature of the challenge before her had been an idea.